Decidim up to 0.31.4/0.32.0.rc1 Demographics Questionnaire Editor edit_questions improper authorization

Summaryinfo

A vulnerability classified as critical has been found in Decidim up to 0.31.4/0.32.0.rc1. Affected is an unknown function of the file /admin/demographics/questions/edit_questions of the component Demographics Questionnaire Editor. This manipulation causes improper authorization. This vulnerability appears as CVE-2026-45086. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Decidim up to 0.31.4/0.32.0.rc1. It has been declared as critical. Affected by this vulnerability is some unknown processing of the file /admin/demographics/questions/edit_questions of the component Demographics Questionnaire Editor. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Decidim is a participatory democracy framework. From 0.31.1 before 0.31.5 and in 0.32.0.rc1 before 0.32.0.rc2, a participant can directly load /admin/demographics/questions/edit_questions and reach the demographics questionnaire editor without the required administrator authorization. The demographics questionnaire editor should require admin access, but the route under /admin/demographics/questions renders the editor interface without checking whether the caller is an admin. A normal participant can load the page and see the live update form action, which proves the protected interface is reachable. This issue is fixed in versions 0.31.5 and 0.32.0.rc2.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-45086 since 05/08/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 0.31.5 or 0.32.0.rc2 eliminates this vulnerability.

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Productinfo

Name

• Decidim

Version

• 0.31.0
• 0.31.1
• 0.31.2
• 0.31.3
• 0.31.4
• 0.32.0.rc1

Website

• Product: https://github.com/decidim/decidim/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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